Careful now. Vitamin D is a fat soluble vitamin, meaning, you take this, it doesn’t just wash out via pee like vitamin C.
“excerpt follows”
Because the body has a built in mechanism for preventing toxicity with vitamin D produced in the skin, there is no risk of vitamin D toxicity due to ultraviolet-B (UVB) exposure - whether from the Sun or a tanning bed.
Supplemental vitamin D bypasses this built-in protection and, if excessive amounts are consumed over a period of time, 25(OH)D blood levels can reach a point where toxicity is possible
http://www.vitamindcouncil.org/about-vitamin-d/what-is-vitamin-d/vitamin-d-toxicity/
Yes, I agree that the sun is the best source of D. In fact, there have been some questions as to whether taking supplements somehow makes the body’s natural vitamin D production from sunlight less effective.
However, the MDR amount of D (400 IU) is now thought to be way too low and will probably be increased by the “experts” soon. I don’t think that 2,000 IU a day would cause problems with toxicity, but everyone does need to be aware that we can OD on D. ;-)
But according to that article, you’d have to take between 40,000 and 2,000000 IU of Vitamin D to be toxic! That’s pretty hard to do. Maybe the only way someone would do this is to eat a jar of those delicious gummy Vitamin D candies.